Ink cartridge



FIG. 1 is a front elevation view of our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a bottom perspective view thereof; and,

FIG. 8 is a top perspective view thereof.

The broken lines are for illustration only and form no part of the claimed design. 

The ornamental design for an ink cartridge, as shown and described. 